Astrolabe back

An image showing 'Record Shot - Do not reproduce.'

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Astrolabe back. The outer ring shows degrees from zero (horizontal) to 90 degrees (vertical). Inside this are a circle showing positions on thezodiac and a calender circle. In the middle are graphs which show the equation of time and the shadow scales.

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Object Details

ID:	AST0602.4
Type:	Astrolabe back
Display location:	Not on display
Creator:	Glenn Ellen Scientific Company
Date made:	1970s
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Overall: 1 mm x 205 mm x 224 mm
Parts:	Astrolabe Astrolabe assembly instruction booklet (AST0602.1) Astrolabe front border (AST0602.2) Astrolabe front latitude plate (AST0602.3) Astrolabe back (AST0602.4) Astrolabe rete (AST0602.5) Astrolabe pointer (AST0602.6) Astrolabe alidade (AST0602.7) Astrolabe latitude plate (AST0602.8) 25 degree latitude plate backboard (AST0602.9) Astrolabe latitude plate (AST0602.10) 30 degree latitude plate backboard (AST0602.11) Astrolabe latitude plate (AST0602.12) 35 degree latitude plate backboard (AST0602.13) Astrolabe latitude plate (AST0602.14) 38 degree latitude plate backboard (AST0602.15) Astrolabe latitude plate (AST0602.16) 40 degree latitude plate backboard (AST0602.17) Astrolabe latitude plate (AST0602.18) 45 degree latitude plate backboard (AST0602.19) Astrolabe latitude plate (AST0602.20) 50 degree latitude plate backboard (AST0602.21) Astrolabe horizon plate (AST0602.22) Horizon plate backboard (AST0602.23) Front backboard (AST0602.24) Back backboard (AST0602.25)